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प्रश्न
Mention two cases in which there is no Doppler effect in sound?
टीपा लिहा
उत्तर
- When source (S) and listener (L) both are at rest.
- When S and L move in such a way that distance between them remains constant.
- When source S and L are moving in mutually perpendicular directions.
- If the source is situated at the centre of the circle along which the listener is moving.
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पाठ 5: Acoustics - Evaluation [पृष्ठ ७१]
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संबंधित प्रश्न
| Column A | Column B |
| (a) Vibrations cause | (1) absorb sound |
| (b) A shriller sound is | (2) second |
| (c) Unit of frequency | (3) sound |
| (d) Unit of time period | (4) of high pitch |
| (e) Curtains | (5) hertz |
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